Like most human traits, blue eyes are determined by genes, and no two people have exactly the same hue. It works a lot like individual fingerprints, making our eyes two of the most distinctive parts ...

They scatter light so that more blue light reflects back out. Eye color depends on the iris ... to let in more or less light through the pupil. The iris is made up of two layers.

Age-related macular degeneration (AMD) AMD is a common eye condition that happens as you get older. It affects the macula, ...

That coloured circle is called the iris and the black spot in the middle is the pupil. This is the part of the eye that lets the ... green and blue, and all the millions of shades in between.

But will filtering out blue light help with the digital eye strain that comes from extended time in front of a screen? Rahul Khurana, an ophthalmologist and former clinical spokesperson for the ...

If evolution occurs through gradations, the critics say, how could it have created the separate parts of the eye -- the lens, the retina, the pupil, and so forth -- since none of these structures ...

For the first time, researchers have been able to observe how the pupils react during sleep over a period of several hours. A look under the eyelids ...

Pupillometry measures the size and reactivity of the pupil, the dark circle at the eye’s centre through which light enters. Typically, the pupil contracts and dilates depending on the amount of ...

osprey and wolf fish Not only is the reindeer's eye beautiful, it is a scientific marvel. The animal's eyes change from a golden colour to a deep blue as summer fades to winter, helping it to see in ...